Test K: Low to High (Clockwise)/High to Low (Counterclockwise) Relay Circuitry Functional Test

PINPOINT TEST K: LOW TO HIGH (CLOCKWISE)/HIGH TO LOW (COUNTERCLOCKWISE) RELAY CIRCUITRY FUNCTIONAL TEST

Normal Operation
When the low to high shift occurs, circuit 782 (BR/WH) provides the four wheel drive (4WD) control module-switched ground path for the clockwise rotation relay. While the low to high (clockwise) relay is energized, circuit 777 (YE) sends battery voltage from the battery junction box (BJB) fuse 3 (30A) and circuit 704 (DG/LG). Circuit 778 (OG) provides ground for the transfer case shift motor to operate in the clockwise direction. When the high to low shift occurs, circuit 781 (OG/LB) provides the 4WD control module-switched ground path for the counterclockwise rotation relay. While the high to low counterclockwise relay is energized, circuit 778 (OG) sends battery voltage from the battery junction box (BJB) fuse 3 (30A) and circuit 704 (DG/LG). Circuit 777 (Y) provides ground for the transfer case shift motor to operate in the counterclockwise direction.

Possible Causes
^ Battery junction box fuse 3 (30A)
^ Circuits:
- 704 (DG/LG)
- 57a (BK)
- 57b (BK)
- 777 (YE)
- 778 (OG)
- 781 (OG/LB)
- 782 (BN/WH)
^ Low to high (clockwise) relay
^ High to low (counterclockwise) relay

K1:

K1-K3:

K3-K4: